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Evaluation of Physical Properties of a Metakaolin-Based Alkali-Activated Binder Containing Waste Foam Glass

Foam glass production process redounds to large quantities of waste that, if not recycled, are stockpiled in the environment. In this work, increasing amounts of waste foam glass were used to produce metakaolin-based alkali-activated composites. Phase composition and morphology were investigated by...

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Autores principales: Mácová, Petra, Sotiriadis, Konstantinos, Slížková, Zuzana, Šašek, Petr, Řehoř, Michal, Závada, Jaroslav
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7730103/
https://www.ncbi.nlm.nih.gov/pubmed/33266214
http://dx.doi.org/10.3390/ma13235458
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author Mácová, Petra
Sotiriadis, Konstantinos
Slížková, Zuzana
Šašek, Petr
Řehoř, Michal
Závada, Jaroslav
author_facet Mácová, Petra
Sotiriadis, Konstantinos
Slížková, Zuzana
Šašek, Petr
Řehoř, Michal
Závada, Jaroslav
author_sort Mácová, Petra
collection PubMed
description Foam glass production process redounds to large quantities of waste that, if not recycled, are stockpiled in the environment. In this work, increasing amounts of waste foam glass were used to produce metakaolin-based alkali-activated composites. Phase composition and morphology were investigated by means of X-ray powder diffraction, Fourier-transform infrared spectroscopy and scanning electron microscopy. Subsequently, the physical properties of the materials (density, porosity, thermal conductivity and mechanical strength) were determined. The analysis showed that waste foam glass functioned as an aggregate, introducing irregular voids in the matrix. The obtained composites were largely porous (>45%), with a thermal conductivity coefficient similar to that of timber (<0.2 W/m∙K). Optimum compressive strength was achieved for 10% incorporation of the waste by weight in the binder. The resulting mechanical properties suggest the suitability of the produced materials for use in thermal insulating applications where high load-bearing capacities are not required. Mechanical or chemical treatment of the waste is recommended for further exploitation of its potential in participating in the alkali activation process.
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spelling pubmed-77301032020-12-12 Evaluation of Physical Properties of a Metakaolin-Based Alkali-Activated Binder Containing Waste Foam Glass Mácová, Petra Sotiriadis, Konstantinos Slížková, Zuzana Šašek, Petr Řehoř, Michal Závada, Jaroslav Materials (Basel) Article Foam glass production process redounds to large quantities of waste that, if not recycled, are stockpiled in the environment. In this work, increasing amounts of waste foam glass were used to produce metakaolin-based alkali-activated composites. Phase composition and morphology were investigated by means of X-ray powder diffraction, Fourier-transform infrared spectroscopy and scanning electron microscopy. Subsequently, the physical properties of the materials (density, porosity, thermal conductivity and mechanical strength) were determined. The analysis showed that waste foam glass functioned as an aggregate, introducing irregular voids in the matrix. The obtained composites were largely porous (>45%), with a thermal conductivity coefficient similar to that of timber (<0.2 W/m∙K). Optimum compressive strength was achieved for 10% incorporation of the waste by weight in the binder. The resulting mechanical properties suggest the suitability of the produced materials for use in thermal insulating applications where high load-bearing capacities are not required. Mechanical or chemical treatment of the waste is recommended for further exploitation of its potential in participating in the alkali activation process. MDPI 2020-11-30 /pmc/articles/PMC7730103/ /pubmed/33266214 http://dx.doi.org/10.3390/ma13235458 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mácová, Petra
Sotiriadis, Konstantinos
Slížková, Zuzana
Šašek, Petr
Řehoř, Michal
Závada, Jaroslav
Evaluation of Physical Properties of a Metakaolin-Based Alkali-Activated Binder Containing Waste Foam Glass
title Evaluation of Physical Properties of a Metakaolin-Based Alkali-Activated Binder Containing Waste Foam Glass
title_full Evaluation of Physical Properties of a Metakaolin-Based Alkali-Activated Binder Containing Waste Foam Glass
title_fullStr Evaluation of Physical Properties of a Metakaolin-Based Alkali-Activated Binder Containing Waste Foam Glass
title_full_unstemmed Evaluation of Physical Properties of a Metakaolin-Based Alkali-Activated Binder Containing Waste Foam Glass
title_short Evaluation of Physical Properties of a Metakaolin-Based Alkali-Activated Binder Containing Waste Foam Glass
title_sort evaluation of physical properties of a metakaolin-based alkali-activated binder containing waste foam glass
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7730103/
https://www.ncbi.nlm.nih.gov/pubmed/33266214
http://dx.doi.org/10.3390/ma13235458
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